Water-tube boiler.



PATENTED 0CT.'15, 1907.

` D. M.. WEBSTER WATER TUBE BOILBR.

APPLICATION FILED APB..16,1906.

@@@Q QwQ@ g-nucuko z- UNITED STATES PATENT OFFICE.

DANiEL M. WEBSTER, oF DAYTON, onto.

WATER-TUBE BOILER.

To all whom it may concern: Y

Be it known that I, DANIEL M. WEBSTER, a citizen ofthe United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented cer- -tain new and useful Improvements in Water-Tube Boilers; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable othersI skilled in the art to which it appertains to make and use'the same, reference being had to the accompanying drawings, and to .the letters and figures of reference marked thereon, which. form a part o this specification. 4

This invention relates to improvements in boilers of the horizontal segtional water tube type. Inboilers of this type, particularly where a large number of units or water pipes are employed,the bottom rows of pipes in the manifolds or sections, or those rows lying nearer the mudl drum, do .not receive a sufficient amount of water in comparison with the amount received in the upper rows of pipes in the manifolds or sections, the result is, that steam pockets will form th'e bottom rows of tubes or pipes resulting in a serious damage and loss of efficiency. In other words, the upper rows of water tubes will receive a proportionately large amount of the water from the steam drum or drums and thus will deprive the lower water tubes of the requisite suplower tubes as well as the upper tubes may receive an adequate supply of water from the steam drums.

4 Preceding a detail description of the invention, reference is made to the accompanying drawings, of

whichw A Figure l, is a rear elevation of a horizontal sectional water tube boiler having my improved equalizing 4 means applied. Fig. 2, is a side elevation of the rear dnd of the'boiler, the water tubes being broken away. Fig. 3, is a top plan view of the rear end of the boiler, the water tubes being broken away, the steam drums and cross boxes being removed and the Walls or boiler casing appearing in section.

'In a detail description of the invention, similar reference characters indicate corresponding parts.

As hereinbefore stated, my improvements are des,

signed especially for boilers of the horizontal sectional water tube type where 'a'large number of units or water tubes are employed. In the drawings, I have illustrated each section or manifold to consist of fourteen units or water tubes, or fourteen headers each assembled` with fourteen units or water tubes. The headers Specification of Letters Patent. Appunti@ ned April 1e, 190e. senti No. 311.825.

Patented oct. 15,1190?.

1 are each united with fourteen inclined Water tubes 2, said water tubes being united to the headers, one above the other by expanding the-m in the staggered form shown. The said headers have their lower ends expanded into the mud-drum 3 at the rear end of the boiler, and it will be observed that the .mud drum 'ex-V tends `out at both ends beyond the two outer headers.

The headers l are further connected with the steam drums 4 by means of upright circulating tubes 5 lying at the rear of the boiler and which are expanded Vinto the cross boxes 6 at the rear ends of the steam drums 4 and which communicatel with said steam drums. Below the water line in the steam drums there is an equalizing pipe 7 which maintains an equal level of the water in the steam drums when two or more drums are employed: this equal level of water is maintained regardless of any unequal demand that may behiade upon. one or the other steam drum in supplyingthe manifolds or sections.

It will 'be remembered that the headers 1., the downtake or circulating tubes 5, and the mud drum 3 are at the I rear end of the boiler, or the lowest point of the inclined water tubes 2. The extreme right andile'ft ends of the cross boxes 6 6 and the extremeright and leftends of the mud drum 3, are connected directly by balance or equalizing pipes 10-10 and these parts are 'placed-in positions which protect them from direct contact with the flame or products of combustion in the natureof es# caping gases, and also from the colder temperature. The brick-setting or iron casing 8 at the rear end of the boiler and on each side of the manifolds or sections is provided with inner perpendicular pockets 9 into the lowerl ends of which are projected the endsof the mud drum, and into the upper ends .of which pockets the ends of the distributing boxes' 6-,6 are projected.

- Within these pockets 9-9 are placed balance or equalizing pipes 10-10 which lie on the exterior of the sections r manifolds; these down vpipes 10-10' form a direct communication between steam drums 4-4 and the mud drum 3, andby reason of their occupying the positions within the pockets 9-,9, said pipes are out of Athe direct draft of the flames and are also protected from Contact with the colder air on the exterior of the boiler casing or setting.` By thus protecting these balance or equalizing pipes 10-10 from the great heat of the escaping flames and gases, the possibility of the for-1" i mation of steam pockets therein, and the consequent obstruction of a full and 4free equalization of water to the lower elements of the manifolds or sections is obviated. And further, by placing the inlet to these balance or equalizing pipes at the extreme ends of the cross boxes 6-6, the lower units or Water tubes are enabled to receive their supply of water simultaneously with the feed of water to the upper water tubes and without in terfering with the supply of water to the upper water tubes. The equalizing pipes 7 before referred to. as con- Q eeen/its necting the steam drum heads below the water lino, may he employed when two or more steam drunis are utilized, to not as an equalizing pipe between seid steam drums. This pipe is connected to the druln heads suheiently high to avoid any interference with the downward current inthe cross boxes and still m :1inttti'n's n circulation below the water line. The extremo right and left; balance or-equalizing pipes 10-10 muy he connected to the inud dr'nn by a short' section or header ole sinuous shape similar to the headers 1 for convenience, or other forms of eonnection may be nitide; the'forin, however, illustrated inthe drawings, and consisting in expanding the ends of said equnlizing tubes into the Inud drum, is thought to be the most.

preferable forni of uniting said pipes with said niud drum.

I claim:

1. IIn u Walter tube boiler, the combination with steunt drums; cross boxes supporting said drums, a series of sections consisting: each of e header and a series ot' inclined water tubes, u series of ven'ctil circulating tubes connect` ing the cross. boxes with the headers, of u mud drum to which the headers of said'sect'ions :ire connected,r n eu'sinr; having perpendicular pockets into which :ire projected the ends of the A7mud drum, and an equulizinpl pipe within each ot' said pockets and forming a direct connection between the outer ends of the cross boxes and the ends of the mud drum lying within said pockets, substantially :is specitied.

2. ln n water tube boiler, the combination of steunt drums, t: s boxes eoininuniczitilt;r with sold drums, u mud drum havin;` its ends in zxlinenlent with the outer ends of tho cross boxes. u series oi' houders. vertical eir culntiir;Y tubes couneetini.: ille cross boxes und the unid drum through tho houders, uquulizin'.;- pipes Connecting the outer ontisot' the cross boxes with the ends oi` the niuddrnin, und u r'usiin,r having ln'rpendituinr por-Lets into \vhith the'euds of the initd drum nro projected :1nd in which the outer ends oi' the cross boxes extend, :tud in which the initializing pipes lie. suhstuutiztlly :is spetitied,

b. in ii wuter tube boiler', tht eoinbinn'tiou with steunt drums, cross boxes conlniunienting` with suid stehin drums. :i series ot' sections eonslstingcr euch ot" :i lit-:nier :1nd :i s ries of inelined witter tubes connected therewith hy tieni circulating,l tubes und the interveningcross boxes, of :i mud druin huvng: its ends in :ilineinent with the outer ends ot' the cr ss boxes :ind to which the houders ol' the seetions nre eonnccted, :t fusing hnving' perpendicular pockets into which the ends of the mud drinn und tinl outer ends of the cross boxes :1ro projected, :rnd cquulizing pipes Iylnp; within said pockets und forming :l connection between the upper side ol' the mnd drinn und thc ends oi' the crossboxes, said equulizinn pipes und the ends of the inurl drum :ind cross boxes lyingl within suid pockets in the casing, substantially :is specitied.

In testimony whereof l ntlix niy signature. in presence ot' two witnesses.

lANlllL M. WNHSTllll. Witnesses (minimi: )L 'l'iiiion.u.n, it. .1. Motitirrr. 

